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fzus63 kmqt 240757
glfls 
expires:202109241600;;093697

open lake forecast for lake superior
national weather service marquette mi
357 am edt fri sep 24 2021

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...as 29.7 inch low pressure over northern lake huron 
lifts north today, a 29.9 inch high pressure ridge extending north 
to south across western lake superior will quickly shift east, 
exiting lake superior this afternoon. meanwhile, a 29.8 inch low 
pressure trough over western minnesota will move east, reaching 
western lake superior by this afternoon. the trough will then deepen 
to 29.6 inches as it sweeps across eastern lake superior this 
evening. a second trough of 29.8 inches will move across lake 
superior on saturday. in its wake, a 29.9 inch high pressure ridge 
will reach lake superior on sunday and linger through tuesday. 

&&


lsz162-241600-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
357 am edt fri sep 24 2021 /257 am cdt fri sep 24 2021/

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...west winds 5 to 15 knots increasing to 15 to 25 knots in
the afternoon. a chance of showers. waves building to 2 to
4 feet. 
.tonight...northwest winds 15 to 25 knots backing west after
midnight. a slight chance of showers. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.saturday...west winds 20 to 30 knots diminishing to 15 to
25 knots late. a slight chance of showers through early
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.saturday night...west winds 10 to 20 knots. a slight chance of
showers after midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots.
waves calm to 2 feet. 

$$
fzus63 kmqt 240757
glfls 
expires:202109241600;;093698

open lake forecast for lake superior
national weather service marquette mi
357 am edt fri sep 24 2021

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...as 29.7 inch low pressure over northern lake huron 
lifts north today, a 29.9 inch high pressure ridge extending north 
to south across western lake superior will quickly shift east, 
exiting lake superior this afternoon. meanwhile, a 29.8 inch low 
pressure trough over western minnesota will move east, reaching 
western lake superior by this afternoon. the trough will then deepen 
to 29.6 inches as it sweeps across eastern lake superior this 
evening. a second trough of 29.8 inches will move across lake 
superior on saturday. in its wake, a 29.9 inch high pressure ridge 
will reach lake superior on sunday and linger through tuesday. 

&&


lsz263-241600-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
357 am edt fri sep 24 2021

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. a chance of showers by mid afternoon.
waves building to 2 to 4 feet. 
.tonight...northwest winds 15 to 25 knots backing west late. a
chance of showers. waves building to 3 to 5 feet occasionally to
7 feet. 
.saturday...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a slight chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet. 
.saturday night...northwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a chance of showers after
midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing southwest by mid 
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots backing northeast after 
midnight. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 

$$

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